Effect of TiO₂ on Hydrogen Evolution Performance of Sn-Ni Alloy Electrode

The Sn-Ni/TiO₂ composite electrode was prepared on the surface of pure copper by electrodeposition method.The morphology,composition,roughness and hydrogen evolution performance of the electrodes were studied by scanning electron microscopy,energy dispersive spectroscopy,laser scanning confocal microscope,cathodic polarization curve and electrochemical impedance spectroscopy.The results show that with the increase of TiO₂ concentration from 0 g/L to 1.0 g/L,the hydrogen evolution performances of the electrodes are improved firstly and then weakened.The Sn-Ni/TiO₂ electrode with the maximum TiO₂ content is obtained at the TiO₂ concentration of 0.8 g/L,and pollen-like agglomerate of TiO₂ is observed on the surface of the electrode which has the largest roughness and the best hydrogen evolution performance.